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From "Horton Simon" <Simon.Hor...@uk.mizuho-sc.com>
Subject RE: some newbie user questions
Date Wed, 16 Aug 2006 08:27:45 GMT
HI,

Sorry to hop onto your discussion Russell and ask a question, but,
reading the following from Aaron:

>The remote cache client does not shutdown
>properly, forcing you to kill the application.

Are there any plans to fix this in the next release? If so, do you have
a rough idea of when this might be fixed, I would appreciate it if you
could tell me. 

This bug bear is making things messy for a production application
shutdown.

Cheers,
Simon


-----Original Message-----
From: Russell East [mailto:reast@esri.com] 
Sent: Wednesday, August 16, 2006 3:08 AM
To: JCS Users List
Subject: Re: some newbie user questions

Thanks for your reply Aaron. 

> I run upwards of 5 or 6 tomcat instances running
> different applications each using JCS on a single box.
>    If they are using distribution plugins that require
> them to bind to aprticular port, then I just configure
> them to listen to different ports.
Just to confirm.  In your system, do all the (5 or 6) tomcat instances 
use precisely the same cache.ccf?  In other words, are they using 
exactly the same cache on disk, and exactly the same cached data?   That

is what I want to do - well, maybe not quite 5 or 6 instances, but at 
least 2 or 3.   If they do, I'm wondering how you get all the instances 
to synch the cache data and key index across the instance's in-memory 
cache - or, does it just work?

-- Russell
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Aaron Smuts wrote:
> --- Russell East <reast@esri.com> wrote:
>  Couple of questions:
>   
>>     1) I suppose that only one application instance
>> at a time, on a 
>> particular computer, can reliably use a jcs region,
>> right?
>>     
>
> No.  I run upwards of 5 or 6 tomcat instances running
> different applications each using JCS on a single box.
>    If they are using distribution plugins that require
> them to bind to aprticular port, then I just configure
> them to listen to different ports.
>
>   
>>     2) is there any code to synch access to the same
>> cache region within 
>> 2 or more apps running on the same machine?
>>     
>
> Yes.  Just have them listen to different ports if use
> the tcp lateral or the rmi remote cache.
>
>   
>>     3) when the application ends, I call
>> JCS.dispose() which takes 
>> several seconds to complete, presumably defragging
>> the cache data - is 
>> there a way to prevent defragging upon dispose?  
>> Would it be advisable 
>> to do that?
>>     
>
> No you can't stop it right now, but you can set a max
> wait time.  The remote cache client does not shutdown
> properly, forcing you to kill the application.
>
>   
>>     4) correspondingly, is there a way to flush
>> memory to disk every now 
>> and then, not necessarily defragging?
>>     
>
> Yes, there is a brand new method that will do this. 
> You can tell it the number to free.  You can pass it
> the size.  It's called freeMemoryElements.
>
>   
>> That'll will do for starters I think - thanks in
>> advance.   j
>> -- Russell
>>     
>
> Cheers,
>
> Aaron
>
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>
>   


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